Volcanic activity in Canary Islands 2021

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A magnitude 5 Earthquake is felt in La Palma, Tenerife, La Gomera and El Hierro
It was located 37 kilometers deep southwest of Villa de Mazo

EFE19 / 11/2021 · UPDATED 07:56

A magnitude 5 Earthquake was felt this morning on the island of La Palma, according to the National Geographic Institute (IGN), which has located it 37 kilometers deep southwest of Villa de Mazo.

The Earthquake, according to the IGN, took place at 1.08: 46, UTC time, with an intensity IV-V, and has been felt in La Palma and also with great intensity in areas of Tenerife, La Gomera and El Hierro, according to Neighbors of these islands write on social networks.

It is one of the largest earthquakes produced since the eruption of the Cumbre Vieja volcano began on September 19.

The IGN also reports on two other smaller earthquakes that occurred in the municipality of Fuencaliente, also on La Palma.

https://diariodeavisos.elespanol.com/202...el-hierro/

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Apologies this is the link you can scroll back the time to watch the activity earlier this morning.

https://www.youtube.com/watch?v=RockPO0pATI

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https://m.facebook.com/story.php?story_f...1707098774

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Instituto Geográfico Nacional de España y CNIG

Continues eruptive activity on the island of #LaPalma (19-11-2021 10:00 UTC)

➡ Since the last announcement 39 earthquakes have been located in the southern area of the island of La Palma, in the vicinity of the ongoing volcanic eruption. Three of these earthquakes have been felt by the population.
➡ The number of earthquakes has decreased over the previous two days and most of the seismicity is located at depths above 30 km.
➡ At 01:08 UTC today, a 5.1 mbLg magnitude Earthquake was recorded at 36 km deep and felt by the population with maximum intensity of IV (EMS), it is the highest magnitude Earthquake since the series began on September 11.
➡ The tremor signal continues at a low level with slight fluctuations in the last few hours.
➡ The network of GNSS permanent stations of the island shows an elevation of about 4 cm along with deformation southwest at LP03, which is the closest to eruptive centers. In the rest of the seasons, slight deflation possibly related to deep seismicity has been stabilized.
➡ In view of the calibrated image at 08:45 UTC, an estimated column height of 3500 masl, and a cloud of ash in the east-southwest direction. The height of the cone is measured getting a value of 1,128 m. above sea level.
The IGN continues its presence on the island, where the CAVE has been established, maintaining, densifying and improving the surveillance network.
🧐 More information: https://bit.ly/3CvxDQv
#IGNSpain #Terremotos #SerieSismica #Canarias #ErupcionLaPalma #volcandelapalma #VigilanciaVolcánica

[jand]

New depths of magma puzzling scientists

The National Geographic Institute (IGN) has confirmed the presence of new magma contributions from high depths of the eruptive system to the intermediate reservoirs from which the La Palma volcano feeds. This increase in the volume of magma puzzles the scientific community, amid what appeared to be a decline in activity.

The appearance of more magma could suppose the prolongation in time of the volcanic activity and, therefore, a greater probability that the lava emissions overflow old flows and generate new damages.

It would be the worst of the scenarios that scientists have studied in recent hours after the highest peak of earthquakes occurred since the eruption began. They are divided between different opinions but they coincide in indicating that the volcano has "revived" after several days of certain stability and a downward trend in the data being monitored.

Those scenarios speak of various possibilities. According to Itahiza Domínguez, IGN seismologist, in the best of scenarios "we could be faced with a compensation of magmatic material in the reservoirs, or with the direct contribution of magma to the surface, as it seems to be". Not surprisingly, last night the lava flows intensified, even with a considerable overflow in the cone.
What we believe is that magma has accumulated for years at that depth of more than 30 kilometers, what we do not know is how much contribution there is at that depth and if there is another connection below that takes magma to that level," Domínguez clarified .

The appearance of days ago of the possible "depleting reservoirs" was just that, a theory or conjecture that has been dismantled by this new behavior of the volcano. Indeed, IGN has already pointed out that "these processes can seem like one thing and change suddenly".

Itahiza Domínguez is clear that, although there is a probable negative scenario that there is much more magma in the depths than previously thought and this could last much longer in time, "the most explosive moment of the volcano has already passed, with magma shallower with more gases and little evolved. The eruptive event will not go beyond a strambolic event, "no matter how long it lasts.

The best parameter to measure this duration is sulfur dioxide (SO2), which despite the large current magma contribution has dropped considerably according to satellite measurements.

The SO2 depends on the amount of magma and the degassing that all this material generates. That is why it is important to check the behavior of this parameter in the coming days, to measure the presence of more magma in the system.

https://www.eltime.es/images02/volcanes/...oladas.jpg

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The lava advances at about 20 meters per hour over agricultural areas and homes
This new lava flow has intensified from 8:00 p.m. on Thursday

NOTICES DIARY11/19/2021 · UPDATED 15:29


The width of the stream of the Cumbre Vieja volcano is 1,250 meters in some sections and the fajana exceeds 32.7 hectares of surface. GIVES
The width of the Cumbre Vieja volcano stream is 1,250 meters in some sections. GIVES
The lava from the La Palma volcano has resumed its advance on agricultural areas and homes on Friday, although it moves slowly, at about 20 meters per hour, and it is likely that in the last hours it has slowed down even more.

This new lava flow has intensified from 8:00 p.m. on Thursday, when there was an overflow of the lava lake with very fluid material that advances on three fronts, but especially between flows four and seven, in the north sector. from the affected area, according to the scientific and technical spokespersons of the Canary Islands Volcanic Emergency Plan (Pevolca), Carmen López and Rubén Fernández.


The other two areas where there is a contribution of lava are the sides of stream 4 and in the lava delta.

The latest measurements indicate that the lava occupies 1,048 hectares, seven more than the day before, and the lava delta has advanced 43 hectares over the sea.

https://diariodeavisos.elespanol.com/202...ign=589509

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Pulso de actividad freatomagmática en la erupción a las 15.00 hora canaria / Pulse of phreatomagmatic activity in the eruption at 3:00 pm Canarian time

https://twitter.com/i/status/1461714837986230277

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Actividad efusiva a las 15.30 desde Tacande. Se registran explosiones continuadas / Effusive activity at 15.30 from Tacande. Continued explosions are recorded

https://twitter.com/i/status/1461722664272285705

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The eruption has shifted most of the visible activity to the area close to the vents again. Like yesterday, there were continuous low lava fountains with dense ash emissions, producing a plume reaching over 3,000 m altitude, as well as a new significant lava overflow from the vents. The ash and steam plume reached more than 3,000 m height today.
It seems that sections of the northern crater wall in the cone collapsed, allowing contained lava to surge out in a short flood, or that generally, more lava is arriving at the rims and able to overflow them. As in the previous cases this happened during the past weeks, a new voluminous lava flow traveled downhill from the cone and invaded new areas, destroying more buildings in its path.

It is not known or easy to say what exactly causes such lava surges. It could be the result of a temporary increase in magma supply or actually also be caused by a decrease of the amount of lava going into the tube system, possibly caused by some obstacles or blockages, forcing some of it to erupt onto the surface at the vent is unknown. Volcanic tremor remains similar as yesterday, but inflation has again increased a bit and totals around 9 cm compared to pre-eruption levels at the station closest to the eruption, which suggests that new magma has been accumulating beneath the surface (and yet has to come out).
Aarly this morning, a magnitude 5.1 quake at 1.08 a.m. woke up the island. Otherwise, the numbers of quakes has remained relatively low, with 10 quakes in total of magnitudes ranging from 3.0-4.0 (not considering 32 smaller quakes of magnitudes between 2.0-2.9).

Sulfur dioxide emissions increased to high values of around 24,000 tons per day. Along with the continued inflation and perhaps the occurrence of strong quakes in the magnitude 4-5 range might indicate that more magma is able to erupt in the near future.
It was reported that the roof of a sports hall collapsed yesterday under the load of ash, which had been increased by the recent rainfall.

https://www.volcanodiscovery.com/lapalma...ivity.html

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https://volcanodiscovery.de/uploads/pics...ENR_us.jpg